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Problem Sheet Truss Section-B Question # 1 For the plane truss composed of the three elements shown in Figure below subjected to a downward force of 10,000 lb applied at node 1, determine the x and y displacements at node 1 and the stresses in each element. Let E = 30x106 psi and A = 2 in.2 for all elements. The lengths of the elements are shown in the figure.

Question # 2 For the two-bar truss shown in Figure below, determine the displacement in the y direction of node 1 and the axial force in each element. A force of P = 1000 kN is applied at node 1 in the positive y direction while node 1 settles an amount  = 50 mm in the negative x direction. Let E = 210 GPa and A = 6:00 10-4 m2 for each element. The lengths of the elements are shown in the figure. Question # 3. For the truss shown in Figure below, solve for the horizontal and vertical components of displacement at node 1 and determine the stress in each element. Also verify force equilibrium at node 1. All elements have A1 = 1 in.2 and E = 10x106 psi. Let L = 100 in.